I haven't seen this exact problem but I've noticed others similar to it. For example, if you change the priority of a pair of clashing season passes, the Tivo won't change which program is clipped right away. It seems that the Tivo will record as per its To Do list. It doesn't refresh that list immediately after making changes so if you make changes only minutes before a program is to record, it will still record as if the change wasn't made.